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. P. J. SPRAGUE.

ELECTRICAL PUMPING APPARATUS.

No. 372,8 4.. Patented Nov. 8, 1887.

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PATENT FRANK J. SPRAGUE, OF NEW YORK, N. Y.

ELECTRICAL PUMPING APPARATUS.

SPECIFICATION orming part of Letters Patent No. 372,824, dated November 8, 1887.

Application filed June 4, .887. Serial No. 240,201.

To'aZZ whom it may concern: 7

Be it known that I, FRANK J. SPRAGUE, of the city of New York, in the county and State of New York, have invented a certain new and useful Improvement in Electrical Pumping Apparatus, of which the following is a specification.

My invention relates to the operation of stationarymaohines or apparatus by electric motors, and especially to reciprocating forcepumps,aud to the operation of two such pumps by a single motor.

My object is to increase the simplicity of construction and arrangement and the efficiency of operation of such apparatus; and my invention consists in the novel devices and combinations of devices employed by me in accomplishing this object, as hereinafter set forth and claimed.

In the accompanying drawings, Figure l is a plan view showing a motor operatively connected with two reciprocating force-pumps according to my invention; Fig. 2, a section on line at a: of Fig. 1; and Fig. 3, a view of a toothed gear-wheel which I use in connection with my invention.

A and A are the two pumps, both operatively connected with the rotating drivingshaft B, upon eagh end of which is a toothed wheel, 0 or C, whose construction will be presently explained.

D is an electro-dynamic motor, which consists of four wire-wound field-magnet cores, E, extending in opposite directions from polepieces F and provided at each end with a yoke or back piece, G. The armature-shaft H extends lengthwise of the field-magnet,having its bearings in the yokes G G. The armature I, so indicated by the dotted lines, turns between the pole-pieces F, and the shaft and commutator-cylinder are between the magnet-cores, the shaft extending, as just described, to the yokes at each end.

The yokes are each made in two parts, meeting at the shaft and channeled for the reception thereof. Then if it is'desired to remove or repair the armature the upper half of the field-magnet may be lifted off and the armature taken out of its bearings without disturbing the centering connections of the field-magnet with the pump shaft.

(N0 model.)

From the yoke at each end of the magnet extends a hanger, K, which terminates in a box, a, inclosing the shaft B on one side, and to which is bolted a box, b, on the other side of the shaft, whereby a centering or sleeve support upon the shaft is provided at both ends of the motor. Upon each end of the armatureshaft is a small toothed wheel or pinion, L, and these pinions engage, respectively, the toothed wheels 0 and O.

The motor is carried by the base or a stationary part of the pump, the support being through a strong spiral spring, M. A projecting heel, N, extends from the middle-0f the pump-base, having a socket, c, at-its outer end, and a projection, d, also extends from the lower magnet-poles. A bolt, 6, passes loosely through these parts, and the spring M surrounds said bolt,1ying in thesocket c. The motor is thus sleeved upon the pump-shaft at one side and flexibly supported upon the stationary part of the pump at the other side.

One of the gear-wheels, O, on the pumpshaft may be an ordinary toothed wheel. The other, 0, is a wheel having an adjustable rim or periphery-such as is claimed, broadly, in

my application filed April 18, 1887, Serial N 0. 235,148. It consists of aweb, f, keyed on the shaft, and a toothed rim, having internal flanges, h h. The web has curved slots or elongated apertures 13 2', through which pass bolts 70, extending from flange hand provided with locking-nuts Z. The object of this is to enable the two pairs of gear-wheels to mesh smoothly and evenly, which otherwise would require the greatest precision and accuracy in the placing of the keys on the shafts and slots on the gears. By my invention all the gears may be placed upon their respective shafts without regard to their meshing, and with the nuts Z loose. or three times backward and forward the adjustable rim of wheel 0 will adjust itself to the right position and the two sets of gears will, when the nuts are tightened, again run evenly and precisely together in the desired manner. I prefer to set the pinions on the armature-shaft, so that one is a half tooth behind the other, whereby a more continuous rotation of the driven shaft is produced, since one gear is at its position of transmitting Then if the motor be turned two and also because of the spring-support of the motor, the noise due to hammering of gears is avoided.

Owing to the peculiar mode of supporting the motor on the pump, so that the driving and the driven shaft geared together are parallel in the same plane, and such plane being capable of a limited turning movement on an axis formed by the driven shaft, the armature-shaft of the motor is always kept in the same position relative to the driven shaft. This construction or arrangement, however, has also further uses.

In starting the motor, if the full current is suddenly put through it, the rotary effort of the armature is not thrown at once upon the pump-shaft and required to overcome the inertia and start the pumps, but the first effort is taken up by the spring M, and the motor thus starts easily, gradually overcoming the tension of the spring, but finally putting its whole power upon the pumps. This also relieves the gears from the danger of stripping or breaking their teeth. \Vhile the motoris running any inequalities in the workthat is, in the pressure of the pump-are taken up by the spring and the angle of the plane of the two shafts, or the position of the motor changes with inequalities in the load or the pressure on the pumps, whereby the motorand gears automatically relieve themselves from strain and adapt themselves to the amount of work at any time.

What I claim is 1. The combination, with a reciprocating pump, of an electric motor flexibly supported upon astationary part of the pump and sleeved upon the pump-shaft and having its armature geared to the pump-shaft, substantially as set forth.

2. The combination, with a reciprocating pump, of an electric motor having its fieldmagnet flexibly supported upon a stationary part of the pump, its armature carried by said field-magnet and geared to the pump-shaft, and an extension from said field-magnet surrounding the pump-shaft, substantially as set forth.

3. The combination, with a reciprocating pump, of an electric motor having a pinion at each end of its armature-shaft, and the pumpshaft having atoothed wheel at each end, with which said pinions engage, respectively, and one of said toothed wheels having an adjustable rim or periphery, substantially as set forth.

This specification signed and witnessed this 26th day of May, 1887.

FRANK J. SPRAGUE.

Vitnesses:

S. D. GREENE, FREMONT WILsoN. 

